Question:
Can we use TPicture.LoadFromFile() for loading images while their file
extension isn't recognized by TPicture? For example if BMP files have been renamed to *.img.
Answer:
If you know the format and it is indeed a bitmap then you can force it to work - see the first piece of code below.
You can even register your own extension with the second piece of code.
begin
// force it to be treated as a bitmap:
Image1.Picture.Bitmap.LoadFromFile('APicture.img');
// register your IMG extension application-wide to be treated as a bitmap:
Image1.Picture.RegisterFileFormat('img','Bitmap file',TBitmap);
Image1.Picture.LoadFromFile('APicture.img');
end.